Default Configuration In Ip Multicast Routing - Cisco Catalyst 4500 Series Configuration Manual

Chapter 35 Configuring IP Multicast
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For more detailed information on IP multicast routing, such as Auto-RP, PIM Version 2, and IP multicast
static routes, refer to the Cisco IOS IP and IP Routing Configuration Guide, Cisco IOS Release 12.3.

Default Configuration in IP Multicast Routing

Table 35-1
Table 35-1
Feature
Rate limiting of RPF
IP multicast routing
PIM
IGMP snooping
Note Source-specific multicast and IGMP v3 are supported.
For more information about source-specific multicast with IGMPv3 and IGMP, see the following URL:
http://www.cisco.com/en/US/docs/ios/ipmulti/configuration/guide/imc_cfg_ssm.html
Enabling IP Multicast Routing
Enabling IP multicast routing allows the Catalyst 4500 series switch to forward multicast packets. To
enable IP multicast routing on the router, enter this command:
Command
Switch(config)# ip multicast-routing
OL-25340-01
Load Splitting of IP Multicast Traffic, page 35-21
shows the IP multicast default configuration.
Default IP Multicast Configuration
Default Value
Enabled globally
Disabled globally
Note
Disabled on all interfaces
Enabled on all VLAN interfaces
Note
When IP multicast routing is disabled, IP multicast traffic data
packets are not forwarded by the Catalyst 4500 series switch.
However, IP multicast control traffic continues to be processed and
forwarded. IP multicast routes can remain in the routing table even
if IP multicast routing is disabled.
If you disable IGMP snooping on an interface, all output ports are
forwarded by the integrated switching engine. When IGMP
snooping is disabled on an input VLAN interface, multicast packets
related to that interface are sent to all forwarding switch ports in the
VLAN.
Purpose
Enables IP multicast routing.
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
Configuring IP Multicast Routing
35-13